Thermal mug



FIG. 1 is a perspective view of the thermal mug from the front top showing my new design;

FIG. 2 is a front view of a thermal mug;

FIG. 3 is a rear view of the thermal mug;

FIG. 4 is a left side view of the thermal mug;

FIG. 5 is a right side view of the thermal mug;

FIG. 6 is a top view of the thermal mug; and,

FIG. 7 is a bottom view of the thermal mug. 

The ornamental design for a thermal mug, as shown and described. 